Plastic jacketed glass articles



A15141411950 l N. ENGELMANN 2,503,033

i PLASTIC JACKETED GLASS ARTICLES FiledNov. 21, 1945 Patented Apr. 4, 1950 UNITED Ns'frAr-rzfs .PATENT foFFlcE l PLASTIC JACKETED 'GLASS ARTICLES Nikolaus ..Enge1mann,:Phi1adelnhia,LER@- Application November 21, 11945SerialN0.f630;014

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My invention relates tonevvandtusefulrplastic jacketed `glass articles, andzparticularlyz'ito any tvylle ofituabular or hollow -f glass 'items AWhiohfit rdesirable -to `'protect f. from Y exterior .shock .for I:blows andstillzbevisiblefin order that fanfattendant may ,ascertain or: know-at all :timesfwvhat is ftaking place fwithin thze glass article.

Another :object-f .the invention .tto provide efmeteringtapereglass tube r especially adapted gjforuse 1inflowqrneters 'of ltheitype in whichfthe fposition of a flow indicating oat, disposed f'in fa.. generally upright-.metering itu-be, indicatesathe Atrate of flow of fluid `vpassing @through vthe meter and to encircle said metering tube Withfa plastic fjaoketl uniquely f connected iathe'reto.

. 4:Another object of :the .,invention is tovprovide ea device of this ch-aracteriwhich lis ',well ffitte'd .for use in connection with 5 fluids whichcxtend f to .fcongeal or coagulate or materiallyfto chang-etheir rviscosity, by provid-ing a staticrairfspace between .the glass article and-.its jacket, -therebyweducing vthe passageof-heat-.or coldftoga minimnan.

,Anotherlobject gof'- the invention is sto provide a transparent inl-astio jacket por "tube, either straight .por ,tapered, and of any desirable cross sectional configuration fitted on a similarly shaped glass itube .-or farticleyand vsheld in place `.on the-glass article by.annular.elasticoncompressible rings of suitable materia l,-such as,r.u;b ber, that lwillcompcliente,for anygsmall amount of difference in `their rco-elicients of expansion.

A;;further object of the.v invention is to provide eat-glass article `having .annular grooves one` the-extterior :circumferenceinspaced-relation,and a K :similarly -shaped ,plastic ,outer yjacket :or shell thai/.ing annular Mgrooves A,on the iinterior circumderence and. aligned Awith the` grooves in .therglass zarticle, said `.grooves adapted :to .receive -rings -of 7elastic or 'gcompressible Y material ffor detachably connecting said jacket or .shell fto the f gla'ssi article. i

A still further object of this invention is to provide -a :plastic fjackete'd zglass.-article, wherein ,the Y plastic Ajacket ,is :of sufficient dimensions #to permit threading or boringvand .tappingthereof y for the reception of securing devices, whereby two such'articles may :be connected together.

Anotherobject ofthe invention is to provide a plastic jacketed glass article in which the jacket is Vspaced from said glass article to pro-- vide a chamber to contain graduations delineated on a surface of either the tube or jacket or on a scale member inserted in said chamber, said scale member either being opaque with the graduations delineated on one face, or transpar- Withthefabo've'and other objects in vieW,r't-his -inventionfconsists ofthe details of construction v:and combination :of elements hereinafter .set

forth and then designated v:by the claims.

Z'Infor'der that thosefskilled ins-the art towwhich this invention'.appertainsmay-` understand howfito :'makeaand-.use'fthefsamejl willdescribe its conlstruction: in: detail, referring `by numerals :to :the accompanying*drawing-iforming.a part: hereof ,ii-.I1 which:

-"l5ig.'1 is -..-a. ivertical sectional view1of -aplastic j acketed metering .tube .and- `a portion: of at plastic ijackete'd :straight glass :tube joined `together fby ra-combination of coupling means.

Fig. l:laissa section on. the` line 13+@ of fFig. i1. Figa. vis aisectionronfthe line 4-.-:4 oftli'ig. v1.

' Fig. i 5 isva. ifragmentary iI longitudinal sectional zview i, of sa plastic jacketed metering `tube show.- :iing another: means .of 1 providing ascale.

' '.1Fig.i6 y is :astriagmentary sectional. elevation-of fa n plastic {jack-ated `:metering :tube snowing .sti11 another meanssfor providing ascale. l

.1f-Fig. :7 :a ifragmentary longitudinal` sectiona tview of :a plasticgjacketed glassI .article i showing anotherflfprmoff coupling means.

',"In rcarryingf'out @my invention as herein fem- ?bodied t0 and i lli-represent glass articles ort-tubes for, otherfhollowy items lswhich `mayabe.l of any .videsirable "shape, Size,. dimensions. or. cross-sectional cconguration. ,For -:purposes of illustration, sa

glass article :120 :which is transparent, fis shown fas; aa metering tubeiandptapers @from onev en'd to the otherfwhileifftheiglass article H isdepicte'd rias fr a. straightitransparent fglass 'tube such .as tis used .asfanconduitfonpipe. 'Theglass article of any form has at least *.,twoannnlaragrooves A22 and i113 appropriatelyispace'dfanart, fforexample,

one located adjacent. yeach-.end of thef tube; -'Ifhe;glassrarticle;is encircled bya transparent -plasticfiacket rerfishell Hl .which i has at ,1 least .two annular grooves 1115 and I 6 onits `inner4 circumcierence, :',spaced apart equally .to the spacing of the grooves 1:2 land i 1:3 :on the glass article with which the plastic jacket is associated, whereby, when the jacket is placed on the glass article, the groove at one location on the plastic jacket will beopposite to or aligned with the groove in a similar position on the glass article.

Rings l1 of elastic, resilient or compressible material are located in each pair of cooperating groovesand securely connect the two items together While permitting their disconnection and allowing for at least a small amount of expansion and contraction between the two items.

In connecting the two articles in this manner, their adjacent walls are spaced apart to provide a chamber i8 which forms a good insulating means due to the static air condition therein and also functions as a holder for a gauge means I9, Fig. 1. rIhis gauge means may be an opaque card with the graduations delineated on an inner face so that when viewing the device from the side opposite said gauge member, the graduations will be visible through one thickness of the transparent plastic jacket and two thicknesses of the glass article. By constructing the gauge member i9 of transparent material it can :be located in any suitable position and viewed from any direction. Said gauge member may be assembled between two of the connecting means il or it may be pasted in position or even allowed to merely rest on the bottom of the chamber i6.

In lieu of the gauge member i9, graduationsl 2l may be delineated on a face of the glass tube as shown in Fig. or they may be delineated on a face of the transparent plastic jacket as indicated at 22 in Fig. 6, and especially on the inner face of said jacket.

The plastic jacket is made of suilcient thickness, dimensions or body to permit the formation of a thread 23 at eitherl or both ends for attachment to metallic or other fittings or coupling means, or for the formation of longitudinally tapped holes 24 for the reception of metal or other studs 25, screws or the like. For con- 4venience of illustration, the plastic jacket I4 surrounding the glass article Il is shown as being exteriorly threaded at 23 with a metal or other flange 26 screwed thereon and attached to the jacket of the other glass article i9 by means of studs which project through the packing 21 and the out turned toe of the flange with nuts 28 screwed on to the studs. The rplastic jacket may have one or more grooves 29 adjacent one or both ends thereof to produce a collar 30 which may be engaged by fastening devices or bored for the reception of bolts or the like.

From the foregoing it will be apparent that I have provided a unitary article which will resist all ordinary shocks that might occur to the device 'or the machine in which it is used, provides efcient insulation against severe or quick changes in temperature which might affect the viscosity of the fluid in the glass tube, and will compensate for any differences in the co-eicients of expansion of the glass and plastic.

Of course I do not wish tc be limited to the exact details of construction herein shown and described, as these may be varied within the scope of the appended claims without departing from the spirit of my invention.

Having thus described my invention, what I claim as new and useful is:

1. A metering tapered glass tube, an outer transparent plastic tube, and ilexible rings entirely within the ends of the outer tube and surrounding the inner tube for holding said tubes together concentrically and in spaced relation throughout the major portions of their lengths.

2. The structure in claim 1 in combination with a transparent scale member positioned in the space between said tubes.

3. A plastic jacketed glass article comprising a glass tube, a transparent plastic tube having an interior diameter between its ends greater than the exterior diameter of the glass tube and surrounding the latter, and rings having resilient, elastic and compressible qualities located wholly within the ends of the tubes to connect them together as a unitary item.

4. In a device of the kind described, a glass tube having an annular groove at each end in the exterior circumference, a plastic tube having -an annular groove at each end in the interior K Atube having an annular groove around the outer circumference near both ends to hold a flexible ring, `an outer transparent plastic tube having ,-a'n annular groove around the inner circumference near both ends, the grooves in both tubes being equally spaced apart, flexible rings tightly tting in said grooves to hold the glass tubing securely in :place inside of the transparent plastic tubing, said plastic tubing resisting shocks from the outside and the flexible rings being shock absorbing, whereby the glass tube is practically shock proof.

6. In a device of the kind described, a tapered glass tube having an annular groove at each end in the exterior circumference, a plastic tube of substantially the same diameter throughout its entire length and having an annular groove at each end in the interior circumference, said plastic tube telescopically mounted over the glass tube, and means in said grooves to hold the two tubes in generally fixed relation, while permitting expansion and contraction of either tube.

NIKOLAUS ENGELMANN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,923,192 Edelmann Aug. 22, 1933 1,975,269 Gray Oct. l2, 1934 2,255,921 Fear Sept. 16, 1941 2,333,884 Porter Nov. 9, 1943 2,342,441 Will Feb. 22, 1944 2,390,445 Mercier Dec. 4, 1945 2,414,086 Brewer Jan. 14, 1947 2,439,614 Schramm Apr. 13, 1948 OTHER REFERENCES Page 309 of Catalogue R41 of Phipps and Bird, Inc., Scientific Laboratory Apparatus, Richmond", Va. Copyright, 1941. 

